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KR830002440B1 - Composite fiber - Google Patents

Composite fiber Download PDF

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Publication number
KR830002440B1
KR830002440B1 KR1019810003310A KR810003310A KR830002440B1 KR 830002440 B1 KR830002440 B1 KR 830002440B1 KR 1019810003310 A KR1019810003310 A KR 1019810003310A KR 810003310 A KR810003310 A KR 810003310A KR 830002440 B1 KR830002440 B1 KR 830002440B1
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component
composite fiber
cross
section
fiber
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KR1019810003310A
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KR830007902A (en
Inventor
박연흠
우종렬
김학묵
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주식회사 코오롱
이상득
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Priority to KR1019810003310A priority Critical patent/KR830002440B1/en
Priority to US06/414,165 priority patent/US4460649A/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23907—Pile or nap type surface or component
    • Y10T428/2395—Nap type surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Multicomponent Fibers (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

내용 없음.No content.

Description

복합섬유Composite fiber

제1도~제3도는 공지의 복함섬유의 횡단면 확대도.1 to 3 are enlarged cross-sectional views of known composite fibers.

제4도는 본 산명 복함섬유의 횡단면 확대도.4 is an enlarged cross-sectional view of the present fiber.

제5도는 화학처리후의 본 발명의 본 발명 복합섬유의 횡단면 확대도.5 is an enlarged cross-sectional view of the composite fiber of the present invention after chemical treatment.

제6도는 본 발명 복합방사 장치의 종단면도.6 is a longitudinal sectional view of the composite spinning device of the present invention.

제7도는 제6도의 Y-X선 횡단면도.7 is a cross-sectional view of the Y-X ray of FIG.

제8도는 제6도의 X-Y선 횡단면도.8 is an X-Y cross-sectional view of FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

A : 쐐기의 최단폭 B : 횡단면의 원주와 쐐기정점부 사이의 최단폭A: Shortest width of the wedge B: Shortest width between the circumference of the cross section and the wedge apex

R : 복합섬유 횡단면의 반경이다.R is the radius of the cross section of the composite fiber.

본 발명은 폴리아미드-폴리에스텔계로 된 복합섬유에 관한 것으로서, 화학적 처리와 물리적 처리에 의하여, 두 성분이 다수의 미세섬유로 분리되도록 한 멀티세그먼트 섬유(multisegement fiber)에 관한 것이다. 본 발명은 특히 화학처리시에 중량손실이 적고 조업성이 우수하며 용이하게 두 성분으로 분리될 수 있도록 한 복합섬유에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to polyamide-polyester-based composite fibers, and to multisegment fibers that allow two components to be separated into a plurality of microfibers by chemical treatment and physical treatment. In particular, the present invention relates to a composite fiber that has a low weight loss during chemical treatment, has excellent operability and can be easily separated into two components.

종래부터 화학적 처리나 물리적 처리에 의하여 구성 성분을 분리하는 멀티세그멘트 섬유는 여러 가지가 알려져 있다.Background Art Conventionally, various types of multisegment fibers are known which separate components by chemical or physical treatment.

즉 제1도의 복합섬유는 미국특허 4,008,344호로 제안된 것인바 이는 해도형(海島形)단면의 섬유로서 해성분과 도성분의 용해성 및 분해성의 차이를 이용하여 해성분만을 용해하거나 분해 제거하고 도성분의 섬유만을 분리시키는 것으로서 이 경우에는 큰중량 비율을 가지는 해성분을 용해 또는 분해시키는 것이기 때문에 중량손실이 많아서 제조원가면에서 바람직하지 못하고 또 폐액 처리가 매우 곤란한 문제점이 있다.That is, the composite fiber of FIG. 1 is proposed in US Pat. No. 4,008,344, which is a sea island-shaped cross-section fiber that dissolves or decomposes only the sea component using the difference in solubility and degradability of the sea component and the island component. Since only the fibers are separated, in this case, since the sea component having a large weight ratio is dissolved or decomposed, the weight loss is large, which is undesirable in terms of manufacturing cost and very difficult to treat the waste liquid.

제2도 및 제3도의 복합섬유는 물리적 방법으로 분리시키는 분리형 단면의 복합섬유인바 이는 조업상 많은 장애를 유발시킨다.The composite fibers in FIGS. 2 and 3 are separate cross-sectional composite fibers that are separated by physical methods, which causes many obstacles in operation.

즉 연신중에 세그멘트가 분리되어 랩, 모우등이 발생할 뿐 아니라 심한 경우에는 절사도 일어나며, 가연 및 제직, 제편 공정중에서도 절사가 발생하여 조업성의 불량 및 불량단의 원인이 된다.In other words, the segment is separated during drawing, and not only lapping, swelling, etc., but also severe cutting may occur, and cutting may occur during the combustible, weaving, and weaving processes, resulting in poor workability and defects.

특히 기모 공정에서 기모장이 불균일해져서 우수한 스웨드풍의 직, 편물을 제조할 수 없게 된다.In particular, the raising stage becomes uneven in the raising process, and it becomes impossible to produce excellent suede-like woven and knitted fabrics.

본 발명자들은 이상의 문제점을 해결하기 위하여 예의 연구 검토한 결과 제1도의 복합섬유와 제2도 및 제3도의 복합섬유의 단점들을 없애고 이들의 장점들을 살릴수 있는 폴리아미드-폴리에스텔계 복합섬유를 얻게 되었다. 즉 본발명의 복합섬유는 중량손실이 적으며 조업상 문제점을 개선한 것이다.The present inventors have made a polyamide-polyester-based composite fiber which can eliminate the disadvantages of the composite fiber of FIG. 1 and the composite fiber of FIG. 2 and FIG. . That is, the composite fiber of the present invention has less weight loss and improves operational problems.

본 발명을 상세히 설명하면 다음과 같다.The present invention is described in detail as follows.

섬유형성성 폴리아미드와 섬유형성성 폴리에스텔로 된 멀티세그먼트형 복합섬유에 있어서,In the multi-segmented composite fiber made of fiber-forming polyamide and fiber-forming polyester,

(1) 제1성분(섬유형성성 폴리아미드 또는 섬유형성성 폴리에스테르)은 복합섬유횡단면의 중심에서 방사상으로 분지(分地)시켜 중심부분으로 향하는 4개 이상의 쐐기형을 만들되, 중심부분과 쐐기부분의 연결부에서 중기의 최단폭 A는 0<A<

Figure kpo00001
R(R은 복합섬유 횡단면의 반경)을 만족시키며(1) The first component (fiber-forming polyamide or fiber-forming polyester) is branched radially from the center of the cross section of the composite fiber to form four or more wedges directed toward the core, where the core and the wedge are In the joint of the part, the shortest width A of the medium period is 0 <A <
Figure kpo00001
R (R is the radius of the cross section of the composite fiber)

(2) 제2성분(섬유형성성 폴리에스텔 또는 섬유형성성 폴리아미드)은 복합섬유 횡단면의 외주부분을 형성하며 아울러 외주부분에서 중심으로 향하여 쐐기상으로 분지하여 제1성분 사이에 제1성분과 교호로 배열되어 있고(2) The second component (fiber-forming polyester or fiber-forming polyamide) forms the outer circumferential portion of the cross section of the composite fiber and branches in a wedge toward the center from the outer circumferential portion, so as to branch between the first component and the first component. Arranged alternately

(3) 복합섬유 횡단면의 원주에서 제1성분 정상부까지의 최단거리 B는 0<B<

Figure kpo00002
R을 만족시키도록 된것이다.(3) The shortest distance B from the circumference of the cross section of the composite fiber to the top of the first component is 0 <B <
Figure kpo00002
To satisfy R.

본 발명은 제2성분이 복합섬유 횡단면의 외주부분을 감싸고 있기 때문에 두 세그메트들이 용이하게 분리되지 않는다. 따라서 연신중은 물론 가연, 제직 및 제편 공정중 안정하게 작업할 수 있으며, 화학처리하드라도 외주부분만이 제거되기 때문에 중량손실을 최대한으로 줄일 수 있다. 다시 말하여 산 혹은 알칼리 처리와 같은 화학적방법을 적절히 행하여 제2성분의 외주만을 제거하고 기모등과 같은 물리적 방법 및 벤질알콜 등과 같은 팽윤제로 처리하는 화학적 방법에 의하여 제1성분과 제2성분이 용이하게 분리되는 것이다.In the present invention, the two segments are not easily separated because the second component surrounds the outer peripheral portion of the cross section of the composite fiber. Therefore, it can work stably during drawing, weaving, weaving and knitting process, and the weight loss can be reduced to the maximum because only the outer peripheral part is removed even by chemical treatment. In other words, the first component and the second component can be easily carried out by appropriately performing a chemical method such as acid or alkali treatment to remove only the outer periphery of the second component, and by treating with a swelling agent such as benzyl alcohol and physical methods such as brushing. To be separated.

또한 본 발명은 제직, 제편할때까지는 외주부분으로 말미암아 세그메트의 분리가 되지 않아서 안정한 작업을 할 수 있으며, 후처리 공정에서 외주부분이 제거된 것을 기모함으로서 제1성분과 제2성분의 세그멘트가 비로서 0.5d이하의 세섬유로 분리되어 스웨이드풍의 직, 편물을 제조할 수 있게 된다.In addition, the present invention can perform a stable operation because the segment is not separated by the outer peripheral portion until weaving, weaving, and by raising the outer peripheral portion removed in the post-treatment process, the segment of the first component and the second component is non- As it is separated into fine fibers of 0.5d or less can be produced suede-like woven, knitted fabric.

본 발명은 B=0이면 제3도와 유사한 형태가 되어서 조업중 세그멘크의 분리가 일어나고 B=>

Figure kpo00003
R이면 외주의 두께가 너무 두터워서 제2성분의 중량 손실이 크므로 제조원가의 상승을 초래한다. 또 본 발명에서 A
Figure kpo00004
Figure kpo00005
R이면 처리 조건이 격렬해야 하고 중량손실이 많으므로 비경제적이어서 최단폭 A는 O<A<
Figure kpo00006
R일때가 가장 적합하였다.In the present invention, when B = 0, a shape similar to that of FIG. 3 occurs, so that separation of the segment occurs during operation, and B =>.
Figure kpo00003
If R, the thickness of the outer circumference is so thick that the weight loss of the second component is large, leading to an increase in manufacturing cost. In the present invention A
Figure kpo00004
Figure kpo00005
If R, treatment conditions must be violent and the weight loss is high, so it is uneconomical, so the shortest width A is O <A <
Figure kpo00006
R was most suitable.

또 본 발명에서 각 성분의 쐐기형 분지를 각각 4개 이상으로 함으로서 분리된 세섬유의 섬도를 0.5d이하로 유지시킬 수 있다.In addition, in the present invention, the fineness of the separated fine fibers can be maintained at 0.5 d or less by making four or more wedge-shaped branches of each component.

본 발명의 복합방사장치는 제6도와 같이 팩바디(pack Body)(1), 샌드컵(Sand Cup)(2), 분배판(3) 및 구금판(4) 등을 구비하고 잇으며 제1성분과 제2성분이 합류되는 방법을 제6도, 제7도, 제8도에 따라서 설명하면 다음과 같다. 즉 제1성분(P1)는 통로(5)를 지나서 일정량씩 토출속공(7)을 통과하여 도공(導孔)의 개구부(10)로 들어간다.The composite spinning device of the present invention is provided with a pack body 1, a sand cup 2, a distribution plate 3, and a detention plate 4 as shown in FIG. A method in which the component and the second component are combined will be described with reference to FIGS. 6, 7, and 8 as follows. That is, the first component P 1 passes through the discharge passage 7 at a predetermined amount through the passage 5 and enters the opening 10 of the coating.

제2성분(P2)는 통로(6), (6')를 경유하여 일정량씩 토출소공(8), (8')을 지나면서 분배되고 분배판과 구금 사이의 통로(9)에서 도공(11)의 개구부(10)로 들어가서 제1성분을 둘러싸면서 방사상으로 퍼져 들어가서 제1성분과 복합되고 도공을 통해서 방사공(12)으로 들어간다. 본 발명의 복합섬유는 제6도와 같은 복합방사장치를 사용하여 폴리아미드계는 230°~260℃, 폴리에스텔계는 260°~300℃로 방사하여 냉각공기로 고화시켜서 800~2,000m/분의 속도로 권취한다. 상기와 같이 방사한 미연신사에 역학적 특성을 부여하기 위하여 적당한 연신배율로 연신한다. 직, 편물용으로는 필라멘트이든 스테이플이든 상관이 없으며 연신방법은 필라멘트의 경우에는 50°~100℃의 가열 로울러로 예열후 분자배향도에 따라서 1.5~4.5배로 연신후 100°~250℃의 열판에서 열고정한다. 스테이플의 경우에는 필라멘트의 경우와 같이 연신한후 스터핑 박스(stuffing box)와 같은 권축장치를 이용하여 8~15개/25mm 정도의 권축을 부여한후 20~130℃에서 30~60분간 열처리 하여 30~150mm로 절단한다.The second component P 2 is distributed through the discharge pores 8 and 8 'by a predetermined amount via the passages 6 and 6' and coated in the passage 9 between the distribution plate and the detention. It enters the opening 10 of 11) and surrounds a 1st component, it spreads radially, it is compounded with a 1st component, and enters the spinning hole 12 through a coating. In the composite fiber of the present invention, using a composite spinning device as shown in Fig. 6, the polyamide-based spinning was carried out at 230 ° to 260 ° C, and the polyester-based spinning was performed at 260 ° to 300 ° C to solidify with cooling air. Wind up at speed. In order to give mechanical properties to the unstretched yarn spun as described above, it is stretched at an appropriate draw ratio. It does not matter whether filament or staple is used for knitting and knitting.The stretching method is a heating roller of 50 ° ~ 100 ℃ in the case of filament, and after stretching to 1.5 ~ 4.5 times according to the molecular orientation after opening, it is opened on a hotplate of 100 ° ~ 250 ℃. Decide In the case of staples, after stretching as in the case of filament, a crimping device such as a stuffing box is used to give a crimp of about 8 to 15 pieces / 25 mm, and then heat-treated at 20 to 130 ° C. for 30 to 60 minutes. Cut to 150 mm.

이와같이 후 처리만 본 발명 복합사는 필라멘트의 경우에는 직, 편물로, 스테이플의 경우에는 부직포로 만들고, 후가공하여 스웨이드퐁의 인공피혁제조용으로 사용한다. 섬유형성성 폴리아미드 나이론4, 나이론6, 나이론7, 나이론11, 나이론12, 나이론66, 나이론610, 폴리메타크실렌아디프아미드, 폴리파라크실렌데칸아미드, 폴리비스사이크로헥실 메타데칸아미드 및 전기(前記) 폴리아미드에 15몰 퍼센트 미만의 제3성분을 함유한 공중합물 또는 이것들의 2종 이상의 공중합 및 혼합물이다.Thus, only the post-treatment composite yarn of the present invention is made of woven or knitted fabric in filament, non-woven fabric in case of staple, and is used for artificial leather manufacturing of suede pong. Fibrous polyamides Nylon 4, Nylon 6, Nylon 7, Nylon 11, Nylon 12, Nylon 66, Nylon 610, Polymethaxyleneadipamide, Polyparaxylenedecanamide, Polybiscyclohexyl metadecanamide and electricity ( Prev) a copolymer containing less than 15 mole percent of a third component in the polyamide or copolymers and mixtures of two or more thereof.

섬유형성성 폴리에스텔은 폴리에틸렌테레프탈레이트, 폴리테트라 메틸렌테레프탈레이트, 폴리에틸렌옥시벤조레이트, 폴리 4-디메틸사이크로헥산테레프탈레이트, 전기 폴리에스텔에 15몰 퍼센트 미만의 제3성분을 함유한 공중합물 또는 이들 2종 이상의 공중합물 및 혼합물등이다.Fibrous polyesters are polyethylene terephthalates, polytetra methylene terephthalates, polyethyleneoxybenzoates, poly 4-dimethylcyclohexaneterephthalates, copolymers containing less than 15 mole percent of a third component in the electrical polyester or Two or more copolymers and mixtures.

[실시예 1]Example 1

25℃, 96% 황산중에서 상대점도가 2.6인 나이론6를 제1성분으로 25℃, 0-chlorophenol 중에서 고유 점도가 0.63인 폴리에틸렌테레프탈레이트를 제2성분으로 복합방사할때 방사온도는 290℃ 직경이 0.23mm인 복합방사구금을 사용하여 용융방사하고 공기중에 냉각하여 1300m/min의 속도로 권취한다. 이것을 80℃의 가열로울러를 통과하여 3.1배로 연신해서 140℃의 열판으로 열고정하여 횡단면에 6개의 돌기를 가진 70D/20F의 필라멘트를 얻었다. 이것을 후 가공하여 인조스웨이드를 제조하였다. 화학적 분할처릴전에는 단면의 분리가 일어나지 않아서 조업성이 양호하였으며 분할 처리후는 분리율이 90%이상으로 양호 하였다.The spinning temperature was 290 ° C in diameter when the composite was spun with nylon 6 with a relative viscosity of 2.6 in 25 ° C and 96% sulfuric acid as the first component. It is melt spun using 0.23mm composite spinneret, cooled in air and wound up at a speed of 1300m / min. This was stretched 3.1 times through a heating roller at 80 ° C. and heat-set with a hot plate at 140 ° C. to obtain a filament of 70D / 20F having six protrusions in a cross section. This was post-processed to produce an artificial suede. There was no separation of the cross section before chemical separation, and the operability was good. After separation treatment, the separation rate was over 90%.

[실시예 2]Example 2

실시예 1과 같은 조건으로 방사, 연신후 스터핑박스를 이용하여 권축을 부여하고 50mm로 절단하여 스테이플을 만들고 침42번을 사용하여 침밀도가 1800본/cm2가 되도록 니들펀치(needle punch)하고 외관밀도가 0.15g/cm3인 부직포를 얻었다. 이것을 NaOH 처리를 하여서 감량시켜 제5도와 같은 형태로 만든후 분리 시켰다. 이때 조업성 및 분리성이 양호하였으며 부직포에 우레탄을 도포시켜 유연제를 처리하여 우수한 품질의 인조 스웨이드를 얻었다.After spinning and stretching under the same conditions as in Example 1, the crimp was applied using a stuffing box, cut into 50 mm to make staples, and needle needle was used to make needle density 1800 bone / cm 2 using needle 42. A nonwoven fabric having an apparent density of 0.15 g / cm 3 was obtained. This was reduced by NaOH treatment to form the same as in Figure 5 and separated. At this time, the operability and separability were good, and the urethane was applied to the nonwoven fabric to treat the softener to obtain an artificial suede of excellent quality.

Claims (1)

성유형성성 폴리아미드와 섬유형성성 폴리에스텔로 되고, 제1성분은 복합섬유 횡단면의 중심부 및 중심부로부터 방사상으로 분지(分地)된 4개 이상의 쐐기형으로 되어 있고, 제2성분은 제1성분의 쐐기 사이에 교호로 배열된것에 있어서, 제2성분이 복합섬유 횡단면의 외주부분을 감싸도록 되어있고 다음 두식을 만족시키도록된 복합섬유.It consists of a sex-forming polyamide and a fiber-forming polyester, wherein the first component is four or more wedges radially branched from the center and the center of the cross section of the composite fiber, and the second component is the first component. The composite fiber arranged alternately between the wedges of, the second component is to surround the outer peripheral portion of the cross section of the composite fiber and to satisfy the following two expressions. 다음 0<A<
Figure kpo00007
R 0<B<
Figure kpo00008
RThen 0 <A <
Figure kpo00007
R 0 <B <
Figure kpo00008
R 여기에서 A : 쐐기의 최단폭 B : 쐐기정점부와 복합섬유 횡단면의 원주감의 최단폭 R : 복합섬유 횡단면의 반경.Where A is the shortest width of the wedge B is the shortest width of the circumference of the wedge apex and the cross section of the composite fiber R is the radius of the cross section of the composite fiber.
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